A circular steel disk cut to a specific diameter and thickness with a plain periphery or a continuous series of milled or ground teeth on the periphery, and an arbor hole of a specific size and shape for mounting on the arbor of a SAW, CIRCULAR BLADE, METAL CUTTING; SAW CIRCULAR, PORTABLE, PNEUMATIC. It is designed for ferrous and nonferrous metals and it may be used to cut nonmetallic materials. Excludes BLADE, CIRCULAR SAW, WOODCUTTING and CUTTER, MILLING, METAL SLITTING. For abrasive cutting of items, see WHEEL, ABRASIVE.